Homoneura (Homoneura) flavida, Shi, Li & Yang, Ding, 2009

Shi, Li & Yang, Ding, 2009, Notes on the Homoneura (Homoneura) beckeri group from the Oriental Region, with descriptions of ten new species from China (Diptera: Lauxaniidae), Zootaxa 2325, pp. 1-28 : 10-12

Homoneura (Homoneura) flavida sp. nov.

( Figs. 4 , 27–31 )

Diagnosis. Face pale yellow without spot. Antenna black. All tibiae each with an incomplete brown basal ring and tarsomere 5 brown on apical 1/2. Wing with a pale brown elliptical spot on dm-cu. Abdomen yellow with sparse silvery white pollen; tergite 2 with a brown median spot and a pair of blackish brown lateral bands; tergites 3–5 each with a blackish brown posterior band, and a blackish brown triangular median spot confluent with the blackish brown transverse band; tergite 6 with a small brown median spot.

Description. MALE. Body length 4.1–4.8 mm, wing length 3.9–4.5 mm. FEMALE. Body length 4.1–4.7 mm, wing length 3.8–4.6 mm.

Head pale yellow. Face pale yellow without spot. Frons yellow, about as long as wide and parallel–sided, with two narrow brown stripes along inner margin of or rows and a narrow brown triangular median stripe, extending to ocellar triangle; ocellar triangle grayish black; oc strong, as long as anterior or, anterior or slightly shorter than posterior or. Gena about 1/5 height of eye. Occiput with a wide grayish brown stripe confluent with ocellar triangle. Antenna black, 1st flagellomere 1.7 times longer than high; arista long plumose, black except brownish base, with longest hairs longer than height of 1st flagellomere. Proboscis yellowish brown, with yellowish hairs and blackish hairs; palpus pale yellow with blackish hairs.

Thorax blackish brown with whitish gray pollen. Mesoscutum with 0+3 dc (anterior dc clearly behind transverse scutal suture), acr in 8 somewhat irregular rows; prsc shorter than 1st post–sutural dc. Anepisternum and katepisternum pale yellow with grayish white pollen, and each with a blackishi brown spot on upper 1/2. Scutellum brownish black except yellow apical margin, with whitish gray pollen. Legs mostly pale yellow, but all tarsi dark yellow except tarsomere 5 brown on apical 1/2; all tibiae each with an incomplete brown basal ring, a pale brown extreme dorsoapical transverse line on mid femur. Fore femur with 4 strong pv and 6 pd, ctenidium with 12 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 4 a and 1 apv; mid tibia with 1 strong preapical ad and 3 strong apv. Hind femur with 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 4 ) slightly yellow, with a pale brown elliptical spot on dm-cu; subcostal cell hyaline; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1) sections in proportion of 2.2: 0.6: 0.4; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.4: 1.9; ultimate section of CuA1 about 1/7 of penultimate. Halter pale yellow.

Abdomen yellow with sparse silvery white pollen; tergite 2 with a brown median spot and a pair of blackish brown lateral bands; tergites 3–5 each with a blackish brown posterior band, and a blackish brown triangular median spot confluent with the blackish brown posterior band; tergite 6 with a small brown median spot. Male genitalia ( Figs. 27–31 ): protandrium circular; epandrium nearly trapeziform, with a row of hairs on dorsoapical corner in lateral view and V–shaped in posterior view, surstylus nearly knife–like, originated from apical part of epandrium at middle; hypandrium slightly conjoint with a pair of acuate triangular sclerites, and hypandrial apodeme distinct; gonopod columniform, slightly curved apically; aedeagus with a pair of triangular dorsal sclerites and subuliform apically, aedeagal apodeme slender, longer than aedeagus.

Type material. Holotype 3 ( CAUC), CHINA, Hainan Province: Ledong, Jianfengeling National Nature Reserve, Zhiwuyuan (800 m), 24. X. 2007, Ding Yang. Paratypes: CHINA, Hainan Province: 1 Ƥ ( CAUC), data same as holotype; 1 Ƥ ( CAUC), Wuzhishan National Nature Reserve, Guanshantai (600 m), 16. V. 2007, Kuiyan Zhang; 1 3, 2 Ƥ ( CAUC), Baisha, Yinggeling National Nature Reserve, Hongmao village (430 m), 22. V. 2007, Kuiyan Zhang.

Distribution. China (Hainan).

Remarks. The new species is very similar to Homoneura (Homoneura) fasciventris Malloch from China ( Taiwan) in the following characters: face and parafacial yellow without spot, wing with a pale brown elliptical spot on dm-cu, abdominal tergites 3–5 each with a blackish brown posterior band; hypandrium W– shaped, gonopod columniform. But it can be separated from the latter by the antennal 1st flagellomere being entirely black, the abdominal tergite 6 being yellow with a small brown median spot; the surstylus being knife–like, the aedeagus having a pair of acuate triangular ventral processes without projecting laterally; the aedeagal apodeme being slender, longer than aedeagus. In H. (H.) fasciventris , the antennal 1st flagellomere is yellow except dark at tip; the abdominal tergite 6 is yellow without spot; the surstylus is claw–like; the aedeagus has a pair of triangular ventral processes, projected laterally; the aedeagal apodeme is equal to the aedeagus in length ( Malloch 1927, 1929; Sasakawa 1992).

Etymology. Latin, flavida , meaning pale yellow, referring to the face and parafacial being pale yellow; a feminine adjective.

Figures

FIGURES 1 – 11. Wing. 1. Homoneura (Homoneura) apicomata sp. nov.; 2. H. (H.) columnaria sp. nov.; 3. H. (H.) convergens sp. nov.; 4. H. (H.) flavida sp. nov.; 5. H. (H.) latissima sp. nov.; 6. H. (H.) nigritarsis sp. nov.; 7. H. (H.) occipitalis Malloch; 8. H. (H.) semicircularis sp. nov.; 9. H. (H.) tortifurcata sp. nov.; 10. H. (H.) yinggelingica sp. nov.; 11. H. (H.) zhangae sp. nov..

FIGURES 27 – 31. Homoneura (Homoneura) flavida sp. nov. Male. 27. protandrium and epandrium, lateral view; 28. protandrium, anterior view; 29. epandrial complex, posterior view; 30. aedeagal complex, ventral view; 31. aedeagal complex, lateral view. Scale 0.1 mm.